Spark plug heat dissipator



y 1968 T. M. WILLIAMS 3,394,337

SPARK PLUG HEAT DISSIPATOR Filed March 8, 1966 INVEHTQR United States Patent 3,394,387 SPARK PLUG HEAT DISSIPATOR Theodore M. Williams, 600 White St., Daytona Beach, Fla. 32014 Filed Mar. 8, 1966, Ser. No. 541,423 Claims. (Cl. 165-47) ABSTRACT OF THE DISCLOSURE A heat dissipator mounted on and supported by a part of the metal body of a spark plug and having upwardly diverging splines surrounding and spaced from. the upper part of the spark plug for carrying off and dissipating heat from the spark plug.

This invention relates to a new and improved device for cooling spark plugs used in internal combustion engines.

One object of the present invention is to greatly increase the heat transfer area of a spark plug making it more efficient in operation, and increasing its period of usefulness.

Another object is to remove the excessive heat from a spark plug body and carry it through a heat conducting dissipator until it projects further into the air stream provided by the engines movement or fan.

Another object of the invention is to provide a heat dissipation device, a portion of which will serve as a spark plug gasket if desired.

A further object is to provide a method of removing heat from the existing type of spark plug now being manufactured which has no built-in circular rings, or heat dissipation devices made a part thereof.

Other objects and advantages will be apparent from the following description in which reference will be made to the accompanying drawing in which:

FIGURE 1 is a plane view of the heat dissipator.

FIGURE 2 is a substantially central vertical sectional view thereof showing in detail a plurality of splines, an offset shoulder of the splines, the cylindrical hollow body, and a lower gasket.

FIGURE 3 is a vertical sectional view, partly in elevation, showing the heat dissipator in relation to a spark lug.

p Referring to FIGURE 2, the splines 4 project outward in a circular pattern. Their width may be varied as needed to suit various applications as these splines can be made as long as needed to project into the air stream. The offset shoulder 1 is to provide clearance by the hexagonal side of the spark plug. The gasket 2 is shown to serve as a plug gasket. However, this could be omitted if manufacturer desires. The spark plug opening hole 3 permits the threaded portion of a spark plug to be inserted in this opening. The heat dissipators cylindrical body 5 fits snugly against the spark plugs metal casing rapidly transferring much larger quantities of heat away from metal casing than previously possible.

FIGURE 2.The splines 4 project upward and outwardly, transferring heat from the heat dissipator body 5 to the offset shoulder 1 and then to the splines 4 themice selves, which project sufficiently far into the air stream to carry away the heat which is often pocketed within the cylinder head socket where the spark plug is located. The gasket 2 affords more contact with the plug. The opening 3 is at the bottom of the heat dissipator assembly.

FIGURE 3.Is a sectional elevation which contains the spark plug assembly 8 with its upper electrode connector 13, the plug porcelain 7, a hexagonal area 9 for suitable wrench, the plugs metal casing 10, spark plugs threaded portion 15, the motor block recess of internal combustion 14, the lower plug electrode 11, the L-shaped bottom electrode 12. Thus having described the spark plug in general for those skilled in the art, I now point out how the gasket 2 fits tightly against spark plug 8, transferring heat upward to tht tightly fitting heat dissipator body 5 to the offset shoulder 1, and then to the splines 4 which dissipate heat from both their inner and outer sides. Although certain preferred embodiments of the invention have been disclosed for the purpose of illustration, it will be evident that various changes and modifications may be made therein without departing from the scope and spirit of the invention. The heat dissipator device is new, useful and novel, not having been thought of by those skilled in the art of spark plug manufacture.

Having thus completely and fully described the invention, what is now claimed as new and desired to be pro tected by Letters Patent of the United States is:

1. A heat dissipator for a spark plug formed of a material constituting a good heat conductor and comp-rising a cylindrical portion adapted to engage snugly around and adapted to contact a part of the metal body portion of a spark plug for mounting the heat dissipator thereon, and a plurality of heat dissipating splines supported by and extending upwardly from said cylindrical portion and disposed around and spaced from the upper part of the spark plug.

2. A heat dissipator as in claim 1, said splines being disposed in spaced apart relation to one another.

3. A heat dissipator as in claim 1, said splines being disposed in upwardly diverging relation to one another.

4. A heat dissipator as in claim 1, and an annular flange extending outwardly from an upper end of said cylindrical portion beneath the wrench land portion of the spark plug body, said splines extending upwardly from an outer edge of said flange in diverging relation to one another.

5. A heat dissipator as in claim 1, and said cylindrical portion having an annular inturned flange at its lower end adapted to engage under a part of the metal plug body and surrounding another part thereof.

References Cited UNITED STATES PATENTS 1,914,940 6/1933 Chilton 31311.5 3,212,569 10/1965 McAdam l85 ROBERT A. OLEARY, Primary Examiner.

C. SUKALO, Assistant Examiner. 

